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No.3(pp.69-95)

Home > Issues > Volume 9 (2004) > No.3(pp.69-95)

Crystallographic and Magnetic Properties of Iron Oxide Nanoparticles for Applications in Biomedicine

Journal of Magnetics, Volume 9, Number 3, 30 Sep 2004, Pages 83-85

Sang Won Lee(Department of Physics, Kookmin University), Kyoung Ja Woo(Nano-Materials Reserach Center, KIST), Chul Sung Kim*

(Department of Physics, Kookmin University)

Abstract

Magnetic nanoparticles have been investigated for use as biomedical purposes for several years. For biomedical applications the use of particles that present superparamagnetic behavior at room temperature is preferred [1-4]. To control the magnetic materials by magnetic field is essential locate particle to the suitable destination on feeding by injection. In order to use them properly, the particles should be nano size. However there are many difficulties in applications, because there is lack of identifications in nano magnetic properties. In our studies, structural and magnetic properties of iron oxide nanoparticles were investigated by XRD, VSM, TEM, and Mossbauer spectroscopy. At 13 K, hyperfine fields of γ-Fe₃O₄ were 516 kOe and 490 kOe, that of Fe₃O₄were 517 kOe and 482 kOe. The saturation magnetizations were 21.42 emu/g and 39.42 emu/g. The particle size of powders is 5～19 nm.

Keywords: Iron oxide; Mossbauer; Applications in Biomedicine; Nanoparticles

DOI:

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